Piston-ring-shell turning and parting machine.



D. F. DOMIZI. PISTON RING SHELL TUFtNfNG'AND PARTING MACHINE.

APPLICATION FILED NOV. 25, 1912.

LM QWm Patented June 22, 1915.

6 SHEETS-SHEET 1.

W lTN asses INVENTOR DflVID. E DOM/Z/ APPLICATION FILED NOV. 25. I912.

Patented June 22, 1915.

6 SHEETS-SHEET 2- WITNESSES INVENTOR DAVID W DOM/Z! D. F. DOMIZL- PISTON RING SHELL TURNING AND PARTING MACHINE.

APPLICATION FILED NOV-25, 1912.

1 1N 95" Patented June 22, 1915.

6 SHEETS-SHEET 3.

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u L0 fir o 0 0 ref i N Q 1 k l o 0 9 R WITNESSES INVEN'IFOR DAVID F. DONHZI WITNESSES D F. DOMIZI.

PISTON RING SHELIQ TURNING AND PARTING MACHINE.

APPLICATION FILED NOV. 25, 1912.

Patented June 22, 1915.

6 SHEETSSHEET 4.

INVENTOR DAVID W DONHZI j ATTORNEY D. F. DOIVHZL.

PISTON RING SHELL TURNING AND PARTING MACHINE.

APPLICATION FILED NOV.25, 1912.

Patented June 22, 1915.

6 SHEETS-SHEET 5. X

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PISTON .RING SHELL TURNING AND PARTING MACHINE.

APPLICATION FILED NOV-25,1912.

Patented J 11116 22, I915;

6 SHEETS-SHEET 6.

mfii 5 O .V% m ww ww w w L o I %W 0 m 5 WW IN V E NTO R DAVID E D OM/ZI WITNESSES DAVID F. DOMIZI, 01F FRANKLIN, PENNSYLVANIA.

PISTON-RING-SHJELL TURNING AND PARTIN G MACHINE.

Specification of Letters Patent.

Patented June 22, 11915.

Application filed November 25, 1912. Serial No. 733,462.

To all whom it may concern: Be it known that I, DAVID F. DoMIzI, citi- -zen of the United States, residing at Franklin, inthe county of Venango and State of Pennsylvania, have invented certain new and useful Improvements in Piston-Ring- Shell Turning and Parting Machines, of which the following is a specification.

The object, construction and utility of my improved piston-ring-shell turning and parting machine are herein set forth with suflicient clearness to enable those skilled in the art to which it most nearly appertains, to make and use the same.

In the manufacture of piston rings of the type commonly termed snap rings, it is the common practice to make them from a cylindrical shell of cast iron of a suflicient length that a number of rings may be cut therefrom. Heretofore it has usually been customary to finish the inside and the periphery of then cut oil and sever the rings one by one. These operations have been performed upon various types of machines, usually lathes or boring mills; but, so far as I am aware, no special machine has been devised for doingthis particular Work, and it is for this purpose that the machine here shown and described has been devised.

lln the operation of my machine, a cylindrical shell of substantially the usual form, though somewhat longer, is employed; the interior of said shell is first'bored out to the desired size, but the operation of boring the inside of the shell is not performed on this machine. The shell is then placed upon the arbor of my machine, and the-periphery thereof is turned to approximately the finished size and While it is still upon the arbor upon which it is turned, it is cut up into rings by a specially constructed tool, all the rings being out off or severed simultaneously. While the plurality of severing tools here shown are circular saws, any other suitable form of. tool may be employed without departing from the scopeof my invention.

In the accompanying drawings which form a part hereof, I have shown one form of construction whereby my inventiye idea may be reduced to practice, but-said drawings are only illustrative, to a certain degree, and do not purport to show the only way in which said idea may be mechanically embodied. a

A plete machine.

The respective'figures of said drawings.

are as follows:

Figure 1 is a front elevation of my com- Fig. 2 is a plan view. Fig. elevation. Fig. 4 is a plan view of a greater portion of the operating mechanism of my machine, the frame-work and surrounding structure being removed. Fig. 5 is a vertical, longitudinal section through the main spindle and arbor and the surrounding structure. Figs. 6 and 7 are details. Fig. 8 is a vertical. transverse section at or near line VIIIVIII of Fig. 2. Figs. 9 and 10 are details. Fig. 11 is a transverse section of the shell arbor.

The same reference numerals are applied to identical parts in all theviews.

I will now describe the construction shown in the drawings by first "pointing out the principal. elements together with their respective functions and purposes and, subsequently how they are correlated, combined and operate to produce the desired results.

The arbor-of the machine upon which the shell is placed is indicated by the numeral 1, the shell 2 being shown in position thereon in Fig. 2. As previously stated said shell 3 is a right end is internally bored before being placed upon I this is done by means of the radially-dis? posed tools 3 carried by the holder 4, which is a portion of the carriage 5.tha-t is ar: ranged to travel upon the cross-rail 6 of the machine, in a line parallel to the axis of arbor 1. Suitable'mechanism for actuat ng said-carriage is provided and willbe pres ently set forth. After said periphery has been turned, the saddle is returned to the position shown in Figs. -1 and 2.and the shell is then severed into ringsby means of the circular saws 7 which are mounted in a swinging housing or bracket 7 see especially Fig. 9. Suitable mechanism is provided for both manually and mechanically actuating said bracket 7 and for mechanically revolving the therein contained saws 7, which mechanism will be presently descri ed.

1 i l n g ve a mo e d ta led d scr pr tion of mv machine. The arbor 1 upon which the shell '2 1s mounted is a split arbor, as will be plainly seen by an inspection of Fig. 11 (Sheet 5), the diameter being such as to fit closely within the shell to be turned. After the shell has been placed upon the arbor, said arbor is expanded therein so as to firmly hold the shell and prevent the same from slipping as it is being operated upon. For the purpose of accomplishing said expansion of the arbor, a rod 8 is inserted longitudinally through said arbor and through the spindle 9. Said rod 8 is attached at its outer end to a piston 10 which is operable within the cylinder 11 to move said rod longitudinally; the preferred form of cylinder and piston for this purpose is shown in Fig. 10. Compressed air is employed for actuating piston 10 and the construction of its cylinder 11 is preferably such that said piston may be actuated in both directions by air pressure, and when such actuation is employed, two air inlet ports 12 provided with pipe-taps are formed within the porthead 13, and from one of said ports one duct 14 leads tothe interior of the cylinder upon one side or face of the piston, and the other duct 15 leads through the cylinder wall to the opposite face of said piston.

At any suitable and convenient point near to where the operator stands, is located a four-way valve 16, (Fig. 4) which is connected to a suitable air supply and through which air may be admitted to and released from either side of piston 10, as may be desired. Rod 8 is provided with several tapered portions 16 which occupy correspondingly tapered seats within saidarbor, and as said rod is caused to move in one direction, (toward the cylinder 10) by the action of the air within said cylinder, said arbor is caused to expand, and as said rod is moved in the opposite direction, the arbor contracts bv reasonpf the resiliency of the metal of which it is made. The end of the rod 8 which projects from the arbor is provided with a bracket-bearing 17, see Fig. 7, to sustain the side strain upon the arbor when the saws are operating; said bearing is providefi with a removable'bushing 18 which is sufliciently large in diameter to permit the shell to pass through it when it is being placed upon the arbor. Said bush ng is firmly clamped within said bracket 17 by means of the bolt 19.

For the purpose of driving spindle 9 and the thereto attached arbor 1,- also other operative portions of the machine, as :will

presently appear,.I provide a belt pulley 20 which may be belted to any suitable source of power. To the shaft 21 of said pulley is secured a worm 22, which meshes with and drives the worm-wheel 23 that is secured upon and keyed to the shaft 24. Upon said shaft 24 are slidingly feathered two pairs of change gears, one pair of which consists of the gears 25 and 26, and the other of the gears 27 and 28. These are arranged to be placed in mesh with the gears 25, 26, 01 27 and 28' respectively which are rigidly aflixed to the revoluble spindle 9. Each pair of change gears are arranged to be shifted upon the shaft 24 by means of a rack 29 and the thereto attached'fork 30, Fig. 6, which forks engage the hubs 31 respectively. Two sectors (not shown) one of which is attached to the rod 32 and the other to rod 33 engage the racks 29 for the purpose of shifting them, and suitable levers 256 and 27-8 are attached to said rods 32 and 33 for convenience of manipulation and for securing the change-gears in the desired position. By means of this construction, a relative change or variation of speed between the arbor and the tool carriage, also between the arbor and the saws is provided for. Shaft 24 passes through the housing 7 of the saws and upon said shaft is keyed a pinion 34 which meshes with a gear 35 that is afiixed to the saw arbor and bv which. the saws are revolved. Housing 7' is provided at either end with a trunnion 36 whereby it is swingingly mounted in the frame of the machine for the purpose of readily permitting said saws to be moved into operative contact with the shell upon said arbor to sever same into rings.

Housing 7' is provided with a segmental rack 37. and meshing therewith is a pinion 38 which is integral with or affixed to shaft 39 and whereby the housing 7 is moved so as to feed'the saws up to the work of severing the shell into rings. M tion is transmitted from shaft 40--see Figs. 3' and 5 through the bevel gears 41 and 42. the spur gears 43 and 44. spur gears 45 and 46 to the worm 47 which engages and drives the worm-wheel that is revolubly mounted upon shaft 39 but may be non-re olubly attached thereto by means of the clutch member 49 which is actuated bv the hand nut 50. By slightly unscrewing said nut said wheel becomes loose upon shaft 39 and mav revolve thereon and upon tightening said nut said wheel becomes secured to said shaft and is then the med um wherebv said shaft 39-is re olved and the saws fed to their work. When nut 50 is loosened. thereby allowing wheel 48 to become revoluble upon the shaft 39 said shaft mav be hand-operated by means of the hand-wheel 51 through the medium of bevel pinion 52 and gear 53.

Motion is transmitted to shaft 40 from shaft 34 through the pinion 40 and gear 40.

The tool-carriage has therein an opening through which the arbor and shell pass, and around which the turning-tools 3 are radially disposed. For the purpose of imparting to said carriage the proper movement, I mount therein a pinion 54. which is arranged to mesh with rack 55 which is integral with,

maaeto the purpose of moving the carriage slowly in one direction when the shell is being turned, and another, a rapid-movement gearing to move the carriage more rapidly in either direction and more particularly of quickly returning the carriage to the starting position after the completion of the turning operation. Said feed gearing is constructed as follows: Upon the shaft 56 to which pinion 55 is secured is loosely mounted a worm-wheel 57 which is also a cup member of a cone-friction clutch; the double-ended-cone member 58 of said clutch is slidably and non-revolubly mounted upon said shaft 56 and is arranged to be longitudinally moved thereon by the rod of a pneumatically-actuated piston contained in the cylinder 59, the construction of which is identical with that shown in Fig. 10 that has been previously described. Upon shaft 60 is slidably feathered a worm 61 which meshes with and revolves the wheel 57; motion is transmitted to shaft 60 through a train of spur gearing consistingof the gears 62, 63 and 64, the last mentioned of which is keyed to spindle 9. When one end of the cone member 58 is engaged with the cup member in-the wheel 57, pinion 54 is caused to revolve, and thus to travel upon the rack 55, whereby a slow, feed movement is imparted to the carriage when the periphery of the shell 2 is being turned. Worm 61 is so mounted that it travels with the carriage. Upon said shaft 56 is also mounted a spiral gear 65 which is also formed into a cup member of a friction clutch arranged to be engaged by the other end of the double-cone member 58. Upon shaft 66 is feathered a spiral pinion 67 which meshes with and revolves 'gear 65. Motion is transmitted from shaft 24 to shaft 66 through a train of gearing consisting of the bevel gears 68, 69, 70, 71, 72, 73 and 74. (For 71-2-3 and 4 see dotted lines inFi-g. 3)?

It will be noted that gears 69 and both mesh with gear 68: Gears 69 and 70 are both revolubly mounted upon shaft and relative to gear 68 are in diametrical opposition to each other whereby they are caused to revolve in opposite directions. baid gears 69 and 70 are loosely mounted upon sleeves of a double friction clutch,preferably that known as the Johnson'clutchwhich sleeves are rigidly secured or keyed to shaft 75, and by shiftin the clutch collar 76 by means of the lever 77 shaft 75 may be caused to revolve with either gear 69 or 70 in the desired direction, whereby the saddle 5 may be moved in-either direction.

Upon a rod 78 is afiixed two stops 79 and 86; upon the lower side of the carriage is formed an eye 81 through which said rod 78 passes loosely, stops 79 and are positioned at the points at which it is desired to have the carriage stop at either limit of its travel and when said eye comes into contact with either of said stops, the rod 78 is moved and this movement is communicated through the bell-crank or lever 82 and rod 83 to the clutch-collar 76 and causes a release of the clutch from either of the gears 69 or 70 with which it may be engaged and this action stops the travel of the carriage 5.

A four-way valve 59 is provided for the admission of air to and release of same from the cylinder 59.

As previously stated the pulley 20 is belted to any suitable source of power and may run continuously. It is revolubly mounted upon its shaft 21 and is operably connected therewith, or disconnected therefrom by means of the clutch 84, which is preferably of the same construction as clutch 76. Said clutch 84 is actuated by means of the lever 85 through the medium of rod 86, lever 87 and rod 88, said rod being connected to the yoke 89 of said clutch. One sleeve 90 of said clutch is rigidly clamped within the bearing 91 and when it is desired to stop the motion of the machine quickly, it may be done by extending the movement of said lever 85 somewhat after the disengaging movement, and in the same direction, this causes an engagement with said sleeve 90 which instantly stops the movement of the machine, which otherwise would continue somewhat because of the inertia of the moving parts.

Concisely stated the operation of my machine is as follows: The shell which has been previously bored, is placed upon the arbor 1 which is caused to expand within said'shell by the longitudinal movement of rod 8, through the action of the piston 10 within cylinder 11. The carriage is now caused to assume its feed movement by so admitting air to cylinder 59v that cone 58 will engage wheel 57. When the turning tools 3 have traversed the full length of shell 2 and completed the turning operation thereon valve 59 is actuated so that the cone 58 will engage the wheel 65, then by placing the lever 77 inthe proper position, cone 58 will release wheel 57 and engage wheel 65 and the carriage will be caused to move backward to its starting point or, until eye and 65, in which no motion is transmitted to either of said ears. The next operation is the severing o the shell into rings with the saws 7. During the turning operatlon the housing 7 is swung backward to the position shown in Fig. to permit the tool of the hand-wheel 51 until they are in contact with the periphery of the shell; nut O point will be determined by the kind ofis then tightened and the feeding of the saws to their work is mechanically continued until they have severed said shell into rings. The machine is then stopped by actuating lever 85, the saws are swung back- Ward, the rings are removed from the arbor, and the machine is again in readiness to repeat the operation. The carriage, or the tool-holder 4 thereon may be equipped with means for the removal of the rings from the arbor, if so desired. After the rings are removed from the machine here shown, they may be transferred to a machine for grinding the lateral edges shown and described in a certain application for Letters Patent of the United States filed by me on the 20th day of January, 1912, Serial No. 672,503, and after the edges have been finished on this machine, they are transferred to my machine for finishing their peripheries, which machine is shown and described in a certain application for Letters Patent of the United States, filed by me on the 19th day of August, 1912, Serial No. 715,601.

In Fig. 11 the periphery of the arbor 1 is shown as being eccentric, which is for the purpose of adapting same for the manufacture of eccentric rings. Inasmuch as all rings are not eccentric, however, said arbor may or may not be eccentric, and as this ring to be made, the same does not in any way pertain to the embodyment of my inventive idea.

I claim the following t I 1. In a piston-ring-shell turning and parting machine, the combination of a frame having a driving shaft mounted therein, a

spindle mounted within said frame, a shellarbor attached to said spindle and arranged to secure a ring-shell thereon, a turningtool carriage mounted upon said frame and arranged to travel thereon in a line parallel with the axis of said arbor, there being an opening in said carriage through which said mandrel passes, turning tools radially dissaid frame, and parting-tools carried by said housing and adapted to sever said shell into a plurality of rings simultaneously.

2. In a piston-ring-shell turning and parting machine, in combination, a spindle revolubly mounted within the frame of said machine, an expansive mandrel attached to said spindle arranged to receive such shell and to secure the same thereon by expansive action, a rod passing longitudinally through said arbor and arranged to expand same, the outer end of said rod being arranged to project beyond the outer end of said mandrel or arbor, a bearing for said projecting end comprising a bracket secured to the rame of said machine, a removable bushing secured in said bracket, there being a hole formed centrally in said bushing for the reception and support of said rod end.

8. In a piston-ring-shell turning and part ing machine, the combination of a frame having a driving shaft mounted therein, a spindle mounted within said frame, a shell arbor attached to said spindle and arranged to secure a ring shell thereon, a turning-tool carriage mounted upon said frame and ar ranged to travel thereon in a line parallel to the axis of said arbor, there being an opening in said carriage through which said mandrel passes, turning tools radially disposed about said opening and arranged to operate upon the periphery of said shell, a parting-tool housing swingingly mounted within said frame, parting tools secured in said housing and arran ed to sever said shell into a plurality 0 rings simultaneously, and means transmitting variable motion from said driving shaft to said spindle, carriage and parting tools, for the respective purposes set forth.

, In testimony whereof I affix my signature in presence-of two witnesses.

DAVID F. DOMIZI. 

